White Rodgers Gas Valve Testing And Replacement - Bradford White RG130T*N Series Service Manual

Gas Valve Testing and Replacement (White Rodgers)
The gas valve is a non-repairable device. If trouble shooting has determined a problem with the gas valve, it
must be replaced.
If the burner and/or pilot do not function, service checks for gas pressure, thermocouple output, magnet
assembly and ECO are to be performed. If these check OK, the gas valve may be faulty.
LINE PRESSURE
The gas valve is designed for a maximum line pressure of 14.0" w.c. and a minimum line pressure of 1.0"w.c.
over the water heater rated manifold pressure (check rating plate). Line pressure must be checked with
burner on and burner off to assure proper readings.
MANIFOLD PRESSURE TESTING
(This procedure assumes a maximum line pressure of 14.0" w.c.)
Step 1. Set gas valve to "OFF" position.
Step 2. Remove pressure tap plug and install pressure tap.
Connect manometer to pressure tap.
Step 3.
Follow lighting instructions and proceed to light
Step 4.
main burner and observe manometer reading.
Proper operating range for natural gas is 4.0 ±0.5" W.C.
Step 5.
Proper operating range for L.P. gas is 10.0 ±0.5" W.C.
Step 6. If pressure is OK, set gas valve to "OFF" remove manometer and pressure tap and replace pressure
tap plug. Check for gas leaks before placing water heater back in operation. If pressure is out of the
specification noted in step 5, proceed to step 7 for proper service procedure.
The manifold pressure is not adjustable. If manifold pressure is outside the range in step
Step 7.
5, the control must be replaced.
SERVICE PROCEDURE RG-V
Gas Valve Testing and Replacement (White
Rodgers)
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